***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****

NOTICE DATE: December 7, 2020

NOTICE TYPE: W-A100917-05 Operations

SHORT DESCRIPTION: Proposal to Modify Mitchell Bend Remedial Action Scheme (RAS)

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: January 6, 2021

LONG DESCRIPTION: ERCOT reviewed the proposal from Oncor Electric Delivery Company LLC (Oncor) to modify the Remedial Action Scheme (RAS) at Mitchell Bend. The modification has been approved with an effective date of January 6, 2021.

ADDITIONAL INFORMATION: Information regarding all RASs can be found on the secure Market Information System (MIS) website under the "Approved Remedial Action Schemes" located on the Transmission page under the Grid section.

Please review the ERCOT website for previous Market Notices related to this subject.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.